Built the LilyGo T-Echo bootloader from source to obtain the UF2 and zip package for updating the bootloader on the devices with outdated bootloaders. The UF2 will allow drag and drop flashing the update, and the zip package is in case adafruit-nrfutil is needed.
I wasn't sure the best location to put this but since we already have the nrf52 flash erase uf2 here, I figured this might be the best. I will be linking to these files in a docs article detailing the process for using them.
rcarteraz